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Fixing realpath issues for provider returning the passed value instead of disabling it. This fixes issues with confirm boxes for those hosted on Network Solutions for example. - #20435
many thanks to the reporter for allowing me to debug this on his server. :) git-svn-id: file:///svn/phpbb/branches/phpBB-3_0_0@8355 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
Meik Sievertsen
parent
35ae4c420f
commit
f24069d32c
2 changed files with 176 additions and 160 deletions
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@ -113,6 +113,7 @@
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<li>[Fix] Tiny code fixes (Bug #20165, #20025, #19795, #14804)</li>
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<li>[Fix] Prepend phpbb_root_path to ranks path for displaying ranks (Bug #19075)</li>
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<li>[Fix] Allow forum notifications if topic notifications are disabled but forum notifications enabled (Bug #14765)</li>
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<li>[Fix] Fixing realpath issues for provider returning the passed value instead of disabling it. This fixes issues with confirm boxes for those hosted on Network Solutions for example. (Bug #20435)</li>
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</ul>
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<a name="v30rc8"></a><h3>1.i. Changes since 3.0.RC8</h3>
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@ -523,177 +523,175 @@ if (!function_exists('stripos'))
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}
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}
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if (!function_exists('realpath'))
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/**
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* Checks if a path ($path) is absolute or relative
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*
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* @param string $path Path to check absoluteness of
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* @return boolean
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*/
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function is_absolute($path)
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{
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/**
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* Checks if a path ($path) is absolute or relative
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*
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* @param string $path Path to check absoluteness of
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* @return boolean
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*/
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function is_absolute($path)
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return ($path[0] == '/' || (DIRECTORY_SEPARATOR == '\\' && preg_match('#^[a-z]:/#i', $path))) ? true : false;
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}
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/**
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* @author Chris Smith <chris@project-minerva.org>
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* @copyright 2006 Project Minerva Team
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* @param string $path The path which we should attempt to resolve.
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* @return mixed
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*/
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function phpbb_own_realpath($path)
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{
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// Now to perform funky shizzle
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// Switch to use UNIX slashes
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$path = str_replace(DIRECTORY_SEPARATOR, '/', $path);
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$path_prefix = '';
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// Determine what sort of path we have
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if (is_absolute($path))
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{
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return ($path[0] == '/' || (DIRECTORY_SEPARATOR == '\\' && preg_match('#^[a-z]:/#i', $path))) ? true : false;
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}
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$absolute = true;
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/**
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* @author Chris Smith <chris@project-minerva.org>
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* @copyright 2006 Project Minerva Team
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* @param string $path The path which we should attempt to resolve.
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* @return mixed
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*/
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function phpbb_realpath($path)
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{
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// Now to perform funky shizzle
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// Switch to use UNIX slashes
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$path = str_replace(DIRECTORY_SEPARATOR, '/', $path);
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$path_prefix = '';
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// Determine what sort of path we have
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if (is_absolute($path))
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if ($path[0] == '/')
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{
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// Absolute path, *NIX style
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$path_prefix = '';
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}
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else
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{
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// Absolute path, Windows style
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// Remove the drive letter and colon
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$path_prefix = $path[0] . ':';
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$path = substr($path, 2);
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}
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}
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else
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{
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// Relative Path
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// Prepend the current working directory
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if (function_exists('getcwd'))
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{
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// This is the best method, hopefully it is enabled!
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$path = str_replace(DIRECTORY_SEPARATOR, '/', getcwd()) . '/' . $path;
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$absolute = true;
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if ($path[0] == '/')
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if (preg_match('#^[a-z]:#i', $path))
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{
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// Absolute path, *NIX style
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$path_prefix = '';
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$path_prefix = $path[0] . ':';
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$path = substr($path, 2);
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}
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else
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{
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// Absolute path, Windows style
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// Remove the drive letter and colon
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$path_prefix = $path[0] . ':';
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$path = substr($path, 2);
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$path_prefix = '';
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}
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}
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else if (isset($_SERVER['SCRIPT_FILENAME']) && !empty($_SERVER['SCRIPT_FILENAME']))
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{
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// Warning: If chdir() has been used this will lie!
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// Warning: This has some problems sometime (CLI can create them easily)
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$path = str_replace(DIRECTORY_SEPARATOR, '/', dirname($_SERVER['SCRIPT_FILENAME'])) . '/' . $path;
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$absolute = true;
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$path_prefix = '';
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}
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else
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{
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// We have no way of getting the absolute path, just run on using relative ones.
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$absolute = false;
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$path_prefix = '.';
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}
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}
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// Remove any repeated slashes
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$path = preg_replace('#/{2,}#', '/', $path);
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// Remove the slashes from the start and end of the path
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$path = trim($path, '/');
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// Break the string into little bits for us to nibble on
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$bits = explode('/', $path);
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// Remove any . in the path, renumber array for the loop below
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$bits = array_values(array_diff($bits, array('.')));
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// Lets get looping, run over and resolve any .. (up directory)
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for ($i = 0, $max = sizeof($bits); $i < $max; $i++)
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{
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// @todo Optimise
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if ($bits[$i] == '..' )
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{
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if (isset($bits[$i - 1]))
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{
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if ($bits[$i - 1] != '..')
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{
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// We found a .. and we are able to traverse upwards, lets do it!
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unset($bits[$i]);
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unset($bits[$i - 1]);
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$i -= 2;
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$max -= 2;
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$bits = array_values($bits);
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}
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}
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else if ($absolute) // ie. !isset($bits[$i - 1]) && $absolute
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{
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// We have an absolute path trying to descend above the root of the filesystem
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// ... Error!
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return false;
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}
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}
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}
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// Prepend the path prefix
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array_unshift($bits, $path_prefix);
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$resolved = '';
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$max = sizeof($bits) - 1;
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// Check if we are able to resolve symlinks, Windows cannot.
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$symlink_resolve = (function_exists('readlink')) ? true : false;
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foreach ($bits as $i => $bit)
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{
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if (@is_dir("$resolved/$bit") || ($i == $max && @is_file("$resolved/$bit")))
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{
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// Path Exists
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if ($symlink_resolve && is_link("$resolved/$bit") && ($link = readlink("$resolved/$bit")))
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{
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// Resolved a symlink.
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$resolved = $link . (($i == $max) ? '' : '/');
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continue;
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}
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}
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else
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{
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// Relative Path
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// Prepend the current working directory
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if (function_exists('getcwd'))
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{
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// This is the best method, hopefully it is enabled!
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$path = str_replace(DIRECTORY_SEPARATOR, '/', getcwd()) . '/' . $path;
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$absolute = true;
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if (preg_match('#^[a-z]:#i', $path))
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{
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$path_prefix = $path[0] . ':';
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$path = substr($path, 2);
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}
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else
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{
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$path_prefix = '';
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}
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}
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else if (isset($_SERVER['SCRIPT_FILENAME']) && !empty($_SERVER['SCRIPT_FILENAME']))
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{
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// Warning: If chdir() has been used this will lie!
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// Warning: This has some problems sometime (CLI can create them easily)
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$path = str_replace(DIRECTORY_SEPARATOR, '/', dirname($_SERVER['SCRIPT_FILENAME'])) . '/' . $path;
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$absolute = true;
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$path_prefix = '';
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}
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else
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{
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// We have no way of getting the absolute path, just run on using relative ones.
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$absolute = false;
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$path_prefix = '.';
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}
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// Something doesn't exist here!
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// This is correct realpath() behaviour but sadly open_basedir and safe_mode make this problematic
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// return false;
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}
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// Remove any repeated slashes
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$path = preg_replace('#/{2,}#', '/', $path);
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// Remove the slashes from the start and end of the path
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$path = trim($path, '/');
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// Break the string into little bits for us to nibble on
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$bits = explode('/', $path);
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// Remove any . in the path, renumber array for the loop below
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$bits = array_values(array_diff($bits, array('.')));
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// Lets get looping, run over and resolve any .. (up directory)
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for ($i = 0, $max = sizeof($bits); $i < $max; $i++)
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{
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// @todo Optimise
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if ($bits[$i] == '..' )
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{
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if (isset($bits[$i - 1]))
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{
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if ($bits[$i - 1] != '..')
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{
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// We found a .. and we are able to traverse upwards, lets do it!
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unset($bits[$i]);
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unset($bits[$i - 1]);
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$i -= 2;
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$max -= 2;
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$bits = array_values($bits);
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}
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}
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else if ($absolute) // ie. !isset($bits[$i - 1]) && $absolute
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{
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// We have an absolute path trying to descend above the root of the filesystem
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// ... Error!
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return false;
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}
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}
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}
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// Prepend the path prefix
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array_unshift($bits, $path_prefix);
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$resolved = '';
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$max = sizeof($bits) - 1;
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// Check if we are able to resolve symlinks, Windows cannot.
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$symlink_resolve = (function_exists('readlink')) ? true : false;
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foreach ($bits as $i => $bit)
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{
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if (@is_dir("$resolved/$bit") || ($i == $max && @is_file("$resolved/$bit")))
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{
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// Path Exists
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if ($symlink_resolve && is_link("$resolved/$bit") && ($link = readlink("$resolved/$bit")))
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{
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// Resolved a symlink.
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$resolved = $link . (($i == $max) ? '' : '/');
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continue;
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}
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}
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else
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{
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// Something doesn't exist here!
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// This is correct realpath() behaviour but sadly open_basedir and safe_mode make this problematic
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// return false;
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}
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$resolved .= $bit . (($i == $max) ? '' : '/');
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}
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// @todo If the file exists fine and open_basedir only has one path we should be able to prepend it
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// because we must be inside that basedir, the question is where...
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// @internal The slash in is_dir() gets around an open_basedir restriction
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if (!@file_exists($resolved) || (!is_dir($resolved . '/') && !is_file($resolved)))
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{
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return false;
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}
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// Put the slashes back to the native operating systems slashes
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$resolved = str_replace('/', DIRECTORY_SEPARATOR, $resolved);
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// Check for DIRECTORY_SEPARATOR at the end (and remove it!)
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if (substr($resolved, -1) == DIRECTORY_SEPARATOR)
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{
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return substr($resolved, 0, -1);
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}
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return $resolved; // We got here, in the end!
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$resolved .= $bit . (($i == $max) ? '' : '/');
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}
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// @todo If the file exists fine and open_basedir only has one path we should be able to prepend it
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// because we must be inside that basedir, the question is where...
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// @internal The slash in is_dir() gets around an open_basedir restriction
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if (!@file_exists($resolved) || (!is_dir($resolved . '/') && !is_file($resolved)))
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{
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return false;
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}
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// Put the slashes back to the native operating systems slashes
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$resolved = str_replace('/', DIRECTORY_SEPARATOR, $resolved);
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// Check for DIRECTORY_SEPARATOR at the end (and remove it!)
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if (substr($resolved, -1) == DIRECTORY_SEPARATOR)
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{
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return substr($resolved, 0, -1);
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}
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return $resolved; // We got here, in the end!
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}
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else
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if (!function_exists('realpath'))
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{
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/**
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* A wrapper for realpath
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@ -701,15 +699,32 @@ else
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*/
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function phpbb_realpath($path)
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{
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$path = realpath($path);
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return phpbb_own_realpath($path);
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}
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}
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else
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{
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/**
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* A wrapper for realpath
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*/
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function phpbb_realpath($path)
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{
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$realpath = realpath($path);
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// Check for DIRECTORY_SEPARATOR at the end (and remove it!)
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if (substr($path, -1) == DIRECTORY_SEPARATOR)
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// Strangely there are provider not disabling realpath but returning strange values. :o
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// We at least try to cope with them.
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if ($realpath === $path || $realpath === false)
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{
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return substr($path, 0, -1);
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return phpbb_own_realpath($path);
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}
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return $path;
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// Check for DIRECTORY_SEPARATOR at the end (and remove it!)
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if (substr($realpath, -1) == DIRECTORY_SEPARATOR)
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{
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$realpath = substr($realpath, 0, -1);
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}
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return $realpath;
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}
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}
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